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金鍾均,金俊泰,鄭炳哲 公州大學校 基礎科學硏究所 1995 自然科學硏究 Vol.4 No.-
VAM과 포자 밀도와 토양 온도, pH, 수분함량과 인 함량은 각각 음의 상관 관계에 있고 유기물 함량과 총 질소량은 각각 양의 상관 관계에 있다. 遷移 안정 지역인 非攪亂地에 비해 攪亂地의 植生에서 VAM 공생이 높았다. The environmental factors of soil affecting on the density of VAM spore were temperature, pH, moisture and phosphorus, which were negative factors, and organic compound and nitrogen were positive. In succession-stability area, the floral zone of disturbance area was higher VAM simbion than non-disturbance area.
상태관측기를 이용한 유도전동기의 부하토크 피드포워드 제어
송호빈,서영수,임영배,성대용,김종균 明知大學校 産業技術硏究所 1997 産業技術硏究所論文集 Vol.16 No.-
This thesis proposed a speed control system for induction motors robust to variations in torque and parameters by feedforward compensating the current portion of load torque, adding a load torque observer to the conventional PI controller in the indirect, vector controlled induction motor system. In the proposed system, in this thesis, the load torque is estimated by the least order load torque observer based on the torque component of vector-controlled induction motor. Thus system composition is simplified. In conclusion, this thesis demonstrate the improved transient characteristic to variations in reference speed and load torque, compared to the conventional PI control method, by means of the feedforward control of the estimated load torqued.
생산기간 단축을 고려한 최적 고객주문 대응점 결정에 관한 연구
최진영,김종균 경기대학교부설 산업기술종합연구소 1997 산업기술종합연구소 논문집 Vol.14 No.-
Generally, Reduction of production leadtime is realize resulted by high investment. Thus reduction of production leadtime is considered with maximal mixed benefit produced in company. The effect for reduction of production leadtime is produce in company improved competitiveness by reduction of product delivery time to customer but also low level safety stock, improved product quality, reduction of operation cost by balanced production. The effect for reduction of production leadtime is related to selection of customer order decoupling point The purpose of this thesis is to determine of optimal customer order decoupling point for maximal benefit of company about reduction of production leadtime. The proposed determine of customer order decoupling point procedure can be applied to competitiveness of company of improved customer service.